رابطه بين پتانسيل شيميايي اكسيژن و تميزي فولاد

In this research, different steps of steel production of Mobarake Steel Company of Isfahan were investigated. Several samples were taken from different steps of the production. The oxygen chemical potential of the molten steel in each stage was measured. With the use of thermodynamic calculations and considering the working conditions (temperature, chemical composition, and...) the relationship between the dissolved oxygen and other elements were plotted and the activity of the oxides with respect to the chemical composition of element was calculated. The chemical composition of the slag according to the amount of added materials and the amount of material loss was calculated. The samples were investigated by the optical and the scanning electron microscope and the chemical composition of inclusions were analyzed. The chemical compositions of the inclusions in the samples were investigated by scanning electron microscope. The chemical composition of the slag was analyzed. Finally, with the use of these results, a close relationship between the kinds of inclusions formed in each step with the oxygen partial pressure was developed.